whim

Athens is ruled by “the desire for political supremacy” and “the whims of the masses.”

Now that Penelope had returned, Margaret would spend the rest of this lovely day cleaning fireplace grates, sweeping carpets, and tending to the whims of her high-strung mistress whenever Lady Constance rang the bell.

"I think it's so ridiculous that your whole safety net and foundation can be pulled away on a whim of the landlord," Kerrie said.

But a night photography class she took on a whim changed her medium, and her life.

Conversely, a style you might not have considered online but picked up on a whim could prove to be a surprise.